Autowired Annotations

Autowired.java

package com.example.demo;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class SimpleSpringApplication {

    public static void main(String[] args) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(SimpleSpringApplication.class);
        System.out.println(context.getBean(B1AndB2Holder.class));
    }

    @Bean
    public B1AndB2Holder holder() {
        return new B1AndB2Holder();
    }

    @Bean
    public Bean1 b1() {
        return new Bean1();
    }

    @Bean
    public Bean2 b2() {
        return new Bean2();
    }

    public class Bean1 {

    }

    public class Bean2 {

    }

    public class B1AndB2Holder {

        @Autowired
        private Bean1 b1;
        @Autowired
        private Bean2 b2;

        @Override
        public String toString() {
            return "B1AndB2Holder{" +
                    "b1=" + b1 +
                    ", b2=" + b2 +
                    '}';
        }
    }
}